Film type battery and layer-built film type battery

ABSTRACT

A film type battery including a positive current collector plate, a positive active material, electrolytes, a negative active material and a negative current collector plate laminated into a layer structure, wherein the positive active material, the negative active material and the electrolytes are peripherally sealed, the positive current collector plate and the negative current collector plate are integrated by sealing agents, a portion of the positive current collector plate and a portion of the negative current collector plate are not contacted by the active material, the electrolytes or the sealing agents, a positive terminal piece is fitted to the positive current collector plate at a side of the layer structure and a negative terminal piece is fitted to the negative current collector plate at the side of the layer structure.

BACKGROUND OF THE INVENTION

1. Technical Field

This invention relates to a film type battery and a layer-built filmtype battery. The battery of the invention is useful, for example, in anID card, a portable telephone, a memory card, a pocket bell, or anelectric automobile etc.

2. Background Art

A conventional film type battery is shown in FIG. 27. The conventionalfilm type battery included a sealing agent 2 put around a generatingelement 1 formed by laminating a positive active material, anelectrolyte and a negative active material into a layer structure. Apositive current collector plate 3 and a negative current collectorplate 4 were disposed above and below the generating element 1, and thegenerating element 1 was then sealed with both current collector plates3 and 4 bonded by the sealing agent 2. Terminals 5 were formed byleaving the surfaces of selected corners of both current collectorplates 3 and 4 as they were and covering the remaining surfaces bysynthetic resin or the like.

Such a film type battery was used also as a layer-built film typebattery by being laminated in plural layers as shown by FIG. 28.

However, the internal temperature of the film type battery having theforegoing structure sometimes rises resulting in fire or, in the worstcase, bursting, when its power consumption becomes large. This defect isalso found in the layer-built film type battery having the foregoingstructure.

SUMMARY OF THE INVENTION

An object of this invention is to provide a film type battery and alayer-built film type battery which can be prevented from undergoing arise in its internal temperature and from catching fire, or evenbursting, when power consumption becomes large.

A film type battery is assembled in such a way that a positive currentcollector plate, a positive active material, electrolytes, a negativeactive material and a negative current collector plate are laminatedinto a layer structure, both active materials and the electrolytes aresealed at their peripheries, and both current collector plates areintegrated by sealing agents; portions of the respective currentcollector plates are left free of the active materials, the electrolytesand the sealing agents and terminal pieces are fitted to one side ofrespective current collector plates.

A first layer-built film type battery is assembled in such a way that apositive active material, electrolytes and a negative active materialare laminated into a layer structure to form a generating element,plural generating elements are laminated with positive current collectorplates or negative current collector plates put between them, bothactive materials and the electrolytes are sealed at their peripheries,and both current collector plates are integrated by sealing agents;portions of the respective current collector plates are left free of theactive materials, the electrolytes and the sealing agents, terminalpieces are fitted to one side of respective current collector plates,and all of the terminal pieces for the positive current collector platesare joined to each other and all of the terminal pieces for the negativecurrent collector plates are joined to each other, respectively.

A second layer-built film type battery is assembled in such a way that apositive active material, electrolytes and a negative active materialare laminated into a layer structure to form a generating element,plural generating elements are laminated with positive current collectorplates or negative current collector plates put between them, bothactive materials and the electrolytes are sealed at their peripheriesand both current collector plates are integrated by sealing agents;portions of the respective current collector plates are left free of theactive materials, the electrolytes and the sealing agents, thegenerating elements provided with the both current collectors arelaminated with frame members forming ventilating spaces placed betweenpredetermined numbers of generating elements, terminal pieces are fittedto one side of respective current collector plates, and all of theterminal pieces for the positive current collector plates are joined toeach other and all of the terminal pieces of the negative currentcollector plates are joined to each other, respectively.

In the film type battery and the layer-built film type battery of thisinvention, the portions of the current collector plates which are freeof the active materials, the electrolytes and the sealing agentsfunction as radiating fins so that heat radiation is efficientlyaccomplished.

When a middle part of the terminal piece is constricted, the terminalpiece will melt down at the constriction in the event that consumedpower exceeds a specified limit. Accordingly, the terminal piece willfunction as a fuse.

When the terminal piece of the positive current collector plate and theterminal piece of the negative current collector plate are so installedas not to be superimposed when they are seen in plan view, electricshort-circuiting can be avoided.

Further, when the radiation fin portion of the positive currentcollector plate and the radiation fin portion of the negative currentcollector plate are so installed as not to be superimposed when they areseen in plan view, electric short-circuiting can be avoided.

Moreover, when the middle part of the terminal piece is narrowconstricted and the rear part beyond the constricted part is madenarrower than the front part, respective terminal pieces of the positivecurrent collector plates are so fitted that only respective front partsare at least partly superimposed when they are seen in plan view, andrespective terminal pieces of the negative current collector plates arefitted in the same way; then the positive terminal pieces and thenegative terminal pieces can be prevented from being electricallyconnected to each other by molten-down remains, so that the fusefunction can be exercised securely.

When the tip ends of respective terminal pieces are previously coatedwith zinc, tin-zinc alloy or tin-lead alloy, the terminal pieces can bejoined easily.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a film type battery according to afirst embodiment of the invention;

FIG. 2 is a plan view of the embodiment of FIG. 1;

FIG. 3 is a sectional view taken on the line III--III of FIG. 1;

FIGS. 4 to 9 are perspective views showing the steps of the process forforming the film type battery of the first embodiment of the invention;

FIG. 10 is a perspective view showing a layer-built film type batteryaccording to a second embodiment of the invention;

FIG. 11 is a sectional view taken on the line XI--XI of FIG. 10;

FIG. 12 is a plan view showing neighboring terminal pieces assembled inthe battery of the second embodiment;

FIG. 13 is a sectional view taken on the line XIII--XIII of FIG. 12;

FIGS. 14 to 19 are perspective views showing the steps of the processfor forming the layer-built film type battery of the second embodiment 2of the invention;

FIG. 20 is a perspective view showing an assembly obtained by theprocess of FIGS. 14 to 19 with the terminal pieces positioned at the topas viewed in FIG. 20;

FIG. 21 is a plan view showing another example of neighboring terminalpieces assembled in the battery;

FIG. 22 is a sectional view taken on the line XXII--XXII of FIG. 21;

FIG. 23 is a perspective view showing a layer-built film type batteryaccording to a third embodiment of the invention;

FIG. 24 is a sectional view taken on the line XXIV--XXIV of FIG. 23;

FIG. 25 is a perspective view showing a frame material for use in thebattery of the third embodiment;

FIG. 26 is a perspective view showing a process for forming the batteryof the third embodiment;

FIG. 27 is a perspective view showing a conventional film type battery;and

FIG. 28 is a perspective view showing a conventional layer-built filmtype battery.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1-3, the film type battery of the first embodiment isformed by laminating a positive current collector plate 3, a positiveactive material layer 11, electrolyte layers 12a and 12b, a negativeactive material layer 13 and a negative current collector plate 4 into alayer structure. The periphery of a generating element 1 comprising bothactive material layers 11 and 13 and electrolyte layers 12a and 12b issealed and at the same time both current collector plates 3 and 4 areintegrated by sealing agents 2a and 2b.

Both current collector plates 3 and 4 are made of stainless steel, forexample. The principal component of the positive active material ismanganese dioxide, the negative active material is lithium, theelectrolyte is a polymer solid electrolyte prepared by adding lithiumperchlorate to polyethylene oxide, and the sealing agents 2a and 2b area polypropylene-based thermal bonding resin including addition agents.They are not limited to these materials, and a material including carbonmay be used for the negative active material.

A portion 31 where the generating element 1 and the sealing agent 2a donot exist is left on one side part of the positive current collectorplate 3, and a portion 41 where the generating element 1 and the sealingagent 2b do not exist is left on one side part of the negative currentcollector plate 4. The portion 31 and the portion 41 are located atopposite ends of the film type battery. In other words, the portion 31and the portion 41 are so installed as not to be superimposed when thefilm type battery is observed in a plan view.

A terminal piece 53 is fitted to one side of the positive currentcollector plate 3, and a terminal piece 54 is fitted to one side of thenegative current collector plate 4. In the film type battery, theterminal pieces 53 and 54 are fitted to the ends of positive currentcollector plate 3 and negative current collector plate 4 oppositeportions 31 and 41 and fitted in such a way as not to be superimposedwhen the film type battery is observed in a plan view. The terminalpieces 53 and 54 are not centrally disposed on the respective currentcollector plates 3 and 4, but are slightly offset. Notches 53a and 54aare formed from both sides at the middle of the terminal pieces 53 and54, so that the terminal pieces 53 and 54 are constricted in widths atthe middle.

The film type battery having the structure just described is formed byway of the process shown in FIGS. 4 to 9. Specifically, the positivecurrent collector plate 3 fitted with the terminal piece 53 as shown inFIG. 4 is prepared, and a positive active material is screen printed ona surface thereof to form a positive active material layer 11 as shownin FIG. 5. In this instance, the positive active material layer 11 is soformed as to leave a large space on a side which will become the portion31, and a small space is left on the other side. For example, in thecase where the positive current collector plate 3 has a width of 54 mmand a length of 86 mm, the positive active material layer 11 is to beformed into a rectangle having a width of 50 mm and a length of 76 mm,so that X₁ =8 mm is to be left on the end becoming the portion 31 and Y₁=2 mm is to be left on the other end.

Next, an electrolyte is screen printed on the positive active materiallayer 11 to form an electrolyte layer 12a as shown in FIG. 6. Then, thesealing agent 2a is put on and bonded to peripheries of the positiveactive material layer 11 and the electrolyte layer 12a so as to obtain aprocessed article 100 shown in FIG. 7. In this instance, the sealingagent 2a is applied to fill the portion Y₁ (FIG. 5).

Similarly, the negative current collector plate 4 having the samedimensions and shapes as those of the positive current collector plate 3is prepared. Then, following the same steps as those of FIGS. 4 to 6,the negative active material layer 13 and the electrolyte layer 12b areformed on the negative current collector plate 4 and the sealing agent2b is further formed so as to obtain a processed article 101 shown inFIG. 8.

As shown in FIG. 9, the processed article 100 of FIG. 7 and theprocessed article 101 of FIG. 8 are placed face to face and laid oneupon another at electrolyte layers 12a and 12b. The sealing agents 2aand 2b are thermally bonded to each other under reduced pressure, sothat the inside, surrounded by both current collector plates 3 and 4 andthe sealing agents 2a and 2b, is under reduced pressure and hermeticallysealed. The thickness of the generating element 1 is 0.2 to 1.0 mm.

In the film type battery of this embodiment, there is good heatradiation because portion 31 of the positive current collector plate 3and portion 41 of the negative current collector plate 4 function asradiation fins. Therefore, the rise of internal temperature in the filmtype battery of this embodiment can be controlled even when the powerconsumption becomes large. Maximum values of internal temperature athigh-rate discharge of the film type battery of this embodiment and theconventional film type battery shown in FIG. 27 were compared. The valuewas 57° C. for the conventional battery and 26° C. for the battery ofthis embodiment. In other words, the rise of internal temperature iscontrolled to an extremely low value in the battery of this embodiment.

In addition, since portion 31 and portion 41 are so configured as not tobe superimposed upon each other when the film type battery is seen inplan view, electric short-circuiting does not occur. Since terminalpieces 53 and 54 are also so configured as not to be superimposed uponeach other when the film type battery is seen in plan view, electricshort-circuiting does not occur.

Further, since the notches 53a and 54a are formed on the terminal pieces53 and 54 so that they are constricted at the middle, the pieces 53 and54 will melt at the narrowed portions when the consumed power exceeds aspecified value. In other words, the terminal pieces 53 and 54 alsofunction as fuses. Consequently, an abnormal rise of internaltemperature can be avoided and environmental damage caused by fire andbursting of the battery can be prevented.

Moreover, since the processed article 100 of FIG. 7 and the processedarticle 101 of FIG. 8 are obtained by continuously processing thepositive active material plate 3 and the negative active material plate4 having the same dimensions and shapes by using similar processes, thefilm type battery of this embodiment can be efficiently manufactured.

As described above, by using the film type battery of this embodiment,the rise of internal temperature can be controlled to an extremely lowvalue even when power consumption becomes large. Thus, adverse influenceon the environment caused by an abnormal rise of internal temperaturecan be assured. These advantages can be accomplished without producingelectric short-circuiting, and productivity can be improved.

The layer-built film type battery is assembled such that the positiveactive material layer 11, the electrolyte layers 12a and 12b, and thenegative active material layer 13 are laminated into a layer structureto form the generating element 1 and plural generating elements 1 arelaminated with the positive current collector plates 3 or the negativecurrent collector plates 4 put between them. Both active material layers11 and 13 and the electrolyte layers 12a and 12b are sealed at theirperipheries and both current collector plates 3 and 4 are integrated bythe sealing agents 2a and 2b.

Materials for use in both current collector plates 3 and 4, the activematerials, the electrolytes and the sealing agents 2a and 2b are same asthose of the first embodiment.

The portions 31 and 41, similar to those of the first embodiment, areinstalled on the positive current collector plate 3 and the negativecurrent collector plate 4, and portions 31 and 41 are located atopposite sides of the layer-built film type battery. In other words,portion 31 and portion 41 are so installed as not to be superimposedupon each other when the layer-built film type battery is seen in planview.

The terminal pieces 53 and 54, on which the notches 53a and 54a areformed in the same way as in the first embodiment, are fitted to oneside of the positive current collector plate 3 and the negative currentcollector plate 4, respectively, in the same way as in the firstembodiment, that is, in such a way as not to be superimposed upon eachother when the layer-built film type battery is seen in plan view. Theterminal pieces 53 and 54 are narrowed at their rear between the notches53a and 54a their respective positive current collectors and negativecurrent collectors, respectively. The respective terminal pieces 53 areso fitted as to partially overlap only at their front parts when thelayer-built film type battery is seen in plan view. The terminal pieces54 are fitted in the same way. All of the terminal pieces 53 are joinedintegrally to each other as illustrated by FIGS. 12 and 13. Theadjoining terminal pieces 53 are joined by bending a side portion 53b ofthe front part of one terminal piece 53 to a side portion 53b of thefront part of another terminal piece 53 to be in contact with it. Theterminal pieces 54 are joined in the same way. All of the terminalpieces 53 are integrally then made integral with each other by meltingzinc which has been coated previously on their tip ends, and all of theterminal pieces 54 are then joined to each other in the same way.Tin-zinc alloy or tin-lead alloy may be used in place of the zinc.

The layer-built film type battery having such structure is formed by wayof the process shown in FIGS. 14 to 19. First, the positive currentcollector plate 3 provided with the terminal piece 53 as shown in FIG.14 is prepared. The front part of the terminal plate 53 is previouslycoated with a fine powder of zinc by blowing while masking its rear partbeyond the notch 53a. A positive active material is screen printed onthe front and back surfaces of the positive current collector plate 3 toform a positive active material layer 11 as shown in FIG. 15. In thisinstance, the area of the positive active material layer 11 is the sameas that of the first embodiment.

Next, an electrolyte is screen printed on the positive active materiallayers 11 of both surfaces to form the electrolyte layers 12a as shownin FIG. 16. Then, the sealing agents 2a are put on and bonded to theperipheries of the positive active material layers 11 and theelectrolyte layers 12a of both surfaces so as to obtain a processedarticle 102 as shown in FIG. 17. The sealing agents 2a are applied inthe same way as those of the first embodiment.

The negative current collector plate 4 having the same dimensions andshapes as those of the positive current collector plate 3 of FIG. 14 isprepared the same way. The negative active material layers 13 and theelectrolyte layers 12b are formed on the front and back surfaces of thenegative current collector plate 4 the same way as those of FIGS. 14 to16, and the sealing agents 2b are further formed so as to obtain aprocessed article 103 shown in FIG. 18.

A processed article 100 as shown in FIG. 7 and a processed article 101as shown in FIG. 8 are formed in the same way as the first embodiment.

Three of the processed article 102 of FIG. 17 and three of the processedarticle 103 of FIG. 18 are prepared. As shown in FIG. 19, the processedarticle 101 and the processed article 100 are disposed at the uppermostand lowermost positions, three sets of the processed article 102 and theprocessed article 103 which are put face to face so as to locate theportion 31 and the portion 41 at opposite sides, are disposed betweenthe processed article 101 and the processed article 100. They are laidone upon another at portions of the electrolyte layers 12a and 12b andthe sealing agents 2a and 2b are thermally bonded to each other underreduced pressure, so that the inside surrounded by both currentcollector plates 3 and 4 and the sealing agents 2a and 2b is underreduced pressure and hermetically sealed. The three processed articles102 and the processed article 100 are formed by using the positivecurrent collector plates 3 fitted with the terminal pieces 53 atdifferent positions respectively, and the respective terminal pieces 53are so disposed as to be located at positions as shown in FIG. 12. Theterminal pieces 54 for the three processed articles 103 and theprocessed article 101 are disposed in the same way. FIG. 20 shows anassembly thus obtained with the terminal pieces 53 and 54 positioned atthe top as seen in FIG. 20. As shown in FIG. 12, the bent side portions53b of the terminal pieces 53 are thermally bonded so as to join all ofthe terminal pieces 53 integrally with each other, and all of theterminal pieces 54 are also joined integrally to each other in the sameway. Thereby, the layer-built film type battery of this embodiment shownin FIG. 10 can be obtained. The thickness of the generating element 1 is0.2 to 1.0 mm.

In the layer-built film type battery of this embodiment, heat radiationis also efficient because the portions 31 of the positive currentcollector plates 3 and the portions 41 of the negative current collectorplates 4 function as radiation fins in the same way as the embodiment 1.Therefore, with the layer-built film type battery of this embodiment,the rise of internal temperature can be controlled even when powerconsumption becomes large. Maximum values of internal temperature athigh-rate discharge were examined on the layer-built film type batteryof this embodiment and a conventional layer-built film type batteryshown in FIG. 28. The value was 69° C. for the conventional battery butit was 28° C. for the battery of this embodiment. In other words, therise of internal temperature is controlled to an extremely low value inthe battery of this embodiment.

In addition, since portions 31 and portions 41 are located at oppositeends, that is, they are so installed as not to be superimposed upon eachother when the layer-built film type battery is seen in plan view,electric short-circuiting does not occur. Further, since the terminalpieces 53 and 54 are also so installed as not to be superimposed uponeach other in the same way as the first embodiment when the layer-builtfilm type battery is seen in plan view, electric short-circuiting doesnot occur.

Moreover, since the notches 53a and 54a are formed on the terminalpieces 53 and 54 so that they are constricted at their middle portions,the pieces will melt at the narrowed portions when consumed powerexceeds a specified limit. In other words, the terminal pieces 53 and 54also function as fuses. Furthermore, they are narrowed at the rearportions beyond the notches 53a and 54a. The terminal pieces 53 are sofitted that only their front portions are superimposed upon each otherwhen the layer-built film type battery is seen in plan view. Theterminal pieces 54 are also fitted in the same way. Therefore, mutualcontact of the terminal pieces 53 and mutual contact of the terminalpieces 54, i.e., electric connections of molten terminal pieces causedby fusing can be prevented. Consequently, the fuse function can beutilized, thereby preventing the generating element 1 from becomingfaulty and avoiding an abnormal rise of internal temperature, so thatenvironmental damage caused by fire and bursting of the battery can beprevented.

The processed article 102 of FIG. 17 and the processed article 103 ofFIG. 18 are obtained by continuously processing the positive currentcollector plate 3 and the negative current collector plate 4 havingsimilar dimensions and shapes by using similar processes. Since thefront parts of respective terminal pieces 53 and 54 are previouslycoated with zinc, the terminal pieces 53 are easily joined to each otherand the terminal pieces 54 are easily joined to each other. Therefore,the layer-built film type battery of this embodiment can be efficientlymanufactured.

As described above, with the layer-built film type battery of thisembodiment, the rise of internal temperature can be controlled to anextremely low value even when the consumed power becomes large,environmental damage caused by an abnormal rise of internal temperaturecan be prevented. These advantages can be achieved without causingelectric short-circuiting, and productivity can be improved.

The adjoining terminal pieces 53 or 54 may be joined as illustrated inFIGS. 21 and FIG. 22 is a sectional view taken on the line XXII--XXII ofFIG. 21. The adjoining terminal pieces may be joined without bending thesides of the front portions.

The layer-built film type battery shown in FIGS. 23 and 24 is the sameas that of the first embodiment in that it is assembled in such a waythat the positive active material layer 11, the electrolyte layers 12aand 12b, and the negative active material layer 13 are laminated into alayer structure to form the generating element 1, and plural generatingelements 1 are laminated with the positive current collector plates 3 orthe negative current collector plates 4 put between them. However, thegenerating elements 1 provided with both current collector plates 3 and4 are laminated with frame members 60 forming ventilating spaces placedbetween predetermined numbers of generating elements 1, between everytwo elements in this instance. The remaining structure is the same asthat of the second embodiment. Certain components used in thisembodiment and shown in FIGS. 23 and 24 are the same as correspondingcomponents used in the second embodiment and it should be understoodthat like elements in the drawings bear like numbers.

The frame member 60 has grooves 61 at predetermined positions on thefour sides so that ventilation between the inside and outside is enabledby the grooves 61 and a ventilation space is formed inside. Holespassing from the inside to the outside may be provided in place of thegrooves 61.

The film type battery having the structure just described is formed asshown in FIG. 26 by laminating the processed article 101 of FIG. 8, theprocessed article 102 of FIG. 17, a processed article 101a formed bymoving the generating element 1 to the side opposite the side of theprocessed article 101, and the frame material 60 of FIG. 25 etc., in thesame way as the second embodiment.

In the layer-built film type battery of this embodiment, heat is alsoradiated from a surface of the negative current collector plate 4 facingon the frame member 60 because a ventilation space is provided by theframe member 60. Therefore, heat radiation is accomplished much betterthan in the second embodiment, and a rise of the internal temperaturecan be better controlled even when the power consumption becomes large.Maximum values of internal temperature at a high-rate of discharge weredetermined comparing the layer-built film type battery of thisembodiment with the conventional layer-built film type battery of FIG.28. The value was 69° C. for the conventional battery but it was 25° C.for the battery of this embodiment. In other words, the rise of internaltemperature is controlled to an extremely low value in the battery ofthis embodiment, as compared not only with the conventional battery butwith the battery of the second embodiment. Other functions and effectsare the same as those of the second embodiment.

In the layer-built film type battery of this embodiment shown in FIG.23, the negative plates protrude from both faces. However, the batterymay be assembled such that the positive plates protrude from both faces.

What is claimed is:
 1. A film battery comprising a positive currentcollector plate, a positive active material, electrolytes, a negativeactive material and a negative current collector plate laminated into alayer structure,wherein the positive active material, the negativeactive material and the electrolytes are peripherally sealed thepositive current collector plate and the negative current collectorplate are integrated by sealing agents, a portion of the positivecurrent collector plate and a portion of the negative current collectorplate are not contacted by the active material, the electrolytes or thesealing agents, a positive terminal piece is fitted to the positivecurrent collector plate at a side of the layer structure and a negativeterminal piece is fitted to the negative current collector plate at theside of the layer structure.
 2. A film battery comprising a positivecurrent collector plate, a positive active material, electrolytes, anegative active material and a negative current collector platelaminated into a layer structure,wherein the positive active material,the negative active material and the electrolytes are peripherallysealed, the positive current collector plate and the negative currentcollector plate are integrated by sealing agents, a portion of thepositive current collector plate and a portion of the negative currentcollector plate are not contacted by the active material, theelectrolytes or the sealing agents, a positive terminal piece is fittedto the positive current collector plate at a side of the layerstructure, a negative terminal piece is fitted to the negative currentcollector plate at the side of the layer structure and the positive andnegative terminal pieces are laterally constricted at the middleportions thereof.
 3. A film battery comprising a positive currentcollector plate, a positive active material, electrolytes, a negativeactive material and a negative current collector plate laminated into alayer structure,wherein the positive active material, the negativeactive material and the electrolytes are peripherally sealed, thepositive current collector plate and the negative current collectorplate are integrated by sealing agents, a portion of the positivecurrent collector plate and a portion of the negative current collectorplate are not contacted by the active material, the electrolytes or thesealing agents, a positive terminal piece is fitted to the positivecurrent collector plate at a side of the layer structure, a negativeterminal piece is fitted to the negative current collector plate at theside of the layer structure and the terminal piece of the positivecurrent collector plate and the terminal piece of the negative currentcollector plate are so fitted as not to be laid one upon another whenthey are viewed from a plan view position.
 4. A film battery comprisinga positive current collector plate, a positive active material,electrolytes, a negative active material and a negative currentcollector plate laminated into a layer structure,wherein the positiveactive material, the negative active material and the electrolytes areperipherally sealed, the positive current collector plate and thenegative current collector plate are integrated by sealing agents, aportion of the positive current collector plate and a portion of thenegative current collector plate are not contacted by the activematerial, the electrolytes or the sealing agents, a positive terminalpiece is fitted to the positive current collector plate at a side of thelayer structure, a negative terminal piece is fitted to the negativecurrent collector plate at the side of the layer structure and theportion of the positive current collector plate not contacted by theactive material, the electrolyte or the sealing agent and the portion ofthe negative current collector plate not contacted by the activematerial, the electrolyte or the sealing agent are so installed as notto be laid one upon another when they are viewed from a plan viewposition.
 5. A layer-built film battery, in which a positive activematerial, electrolytes and a negative active material are laminated intoa layer structure to form a generating element, plural generatingelements are laminated with positive current collector plates ornegative current collector plates put between them, and the both activematerials and the electrolytes are sealed at their peripheries and theboth current collector plates are integrated by sealing agents;characterized by that portions where the active materials, theelectrolytes and the sealing agents do not exist are left on respectivecurrent collector plates, terminal pieces are fitted to one sides ofrespective current collector plates, and all of the terminal pieces forthe positive current collector plates are jointed with each other andall of the terminal pieces for the negative current collector plates arejointed with each other, respectively.
 6. A layer-built film battery, inwhich a positive active material, electrolytes and a negative activematerial are laminated into a layer structure to form a generatingelement, plural generating elements are laminated with positive currentcollector plates or negative current collector plates put between them,and the both active materials and the electrolytes are sealed at theirperipheries and the both current collector plates are integrated bysealing agents; characterized by that portions where the activematerials, the electrolytes and the sealing agents do not exist are lefton respective current collector plates, the generating elements providedwith the both current collectors are laminated with frame materialsforming ventilating spaces put between them on every voluntary quantityof generating element, terminal pieces are fitted to one sides ofrespective current collector plates, and all of the terminal pieces ofthe positive current collector plates are jointed with each other andall of the terminal pieces of the negative current collector plates arejointed with each other, respectively.
 7. A layer-built film battery asset forth in claim 5, in which the terminal pieces are laterallyconstricted at the middle portions thereof.
 8. A layer-built filmbattery as set forth in claim 5 in which the terminal pieces of thepositive current collector plates and the terminal pieces of thenegative current collector plates are so fitted as not to be laid oneupon another when they are viewed from a plan view position.
 9. Alayer-built film battery as set forth in claim 5 in which the terminalpieces are made narrow at their middle portions, rear portions are madesmaller in widths than those of front portions beyond the narrowedportions, the terminal pieces of the positive current collector platesare so fitted that only front parts are laid one upon another when theyare viewed from a plan view position and the terminal pieces of thenegative current collector plates are also so fitted that only frontparts are laid one upon another when they are viewed from the plan viewposition.
 10. A layer-built film battery as set forth in claim 5 inwhich the portions of the positive current collector plates where theactive materials, the electrolytes and the sealing agents do not existand the portions of the negative current collector plates where theactive materials, the electrolytes and the sealing agents do not exist,are so installed as not to be laid one upon another when they are viewedfrom a plan view position.
 11. A layer-built film battery as set forthin claim 5 in which the terminal pieces are jointed with each other bymelting zinc, tin-zinc alloy or tin-lead alloy which are previouslycoated on their tip ends.
 12. A layer-built film battery as set forth inclaim 6, in which the terminal pieces are laterally constricted at themiddle portions thereof.
 13. A layer-built film battery as set forth inclaim 6, in which the terminal pieces of the positive current collectorplates and the terminal pieces of the negative current collector platesare so fitted as not to be laid one upon another when they are viewedfrom a plan view position.
 14. A layer-built film battery as set forthin claim 6, in which the terminal pieces are made narrow at their middleportions, rear portions are made smaller in widths than those of frontportions beyond the narrowed portions, the terminal pieces of thepositive current collector plates are so fitted that only front partsare laid one upon another when they are viewed from a plan view positionand the terminal pieces of the negative current collector plates arealso so fitted that only front parts are laid one upon another when theyare viewed from the plan view position.
 15. A layer-built film batteryas set forth in claim 6, in which the portions of the positive currentcollector plates where the active materials, the electrolytes and thesealing agents do not exist and the portions of the negative currentcollector plates where the active materials, the electrolytes and thesealing agents do not exist, are so installed as not to be laid one uponanother when they are viewed from a plan view position.
 16. Alayer-built film battery as set forth in claim 6, in which the terminalpieces are jointed with each other by melting zinc, tin-zinc alloy ortin-lead allow which are previously coated on their tip ends.